Installing Pellet Stove

Hello and welcome to the forum

You need either 3 inch or 4 inch pellet pipe (depending on what the stove is designed for.

Keep the assembly as simple as possible with the least number of 90 degree bends possible.

An adapter to connect the pellet pipe to the 8 inch is readily available.

Once the system is all figured out and you are assembling it, use high temp silicone sealer (Black) to seal the pellet pipe to the adapter and into the old chimney.

Depending on the set up, you may want to get a slip joint section to allow easy adjustment.

Be sure to get an approved floor pad to sit the stove on before you measure and buy the pipe.

Silicone the joint with the stove outlet.

Use high temp foil tape to wrap all the joints, as this prevents leaks.

The attached piccy shows joints wrapped with the tape. the tape is wrapping the connection as well as the elbow joints.
Done carefully, this method is smoke tight and looks good too.

If need be, it can be painted.

The tape is far prettier than silicone slopped all over the joints and is easy to remove if you need to. (Heat gun works sweet)

pchan6788 said:

I've talked to a couple pellet stove stores and learned that the installers will just install my new pellet stove into the existing clay flue that my old wood stove was using. They said that since my house isn't that new that they don't have to install an outside air kit. It seems like its just a plug and play type of situation.

My city office and insurance are fine with me installing it by myself. I'm fairly handy and think I could attach all the vent pipe from the stove to the 8 inch opening in my wall into the chimney. What kind of pipe will I need to buy? The black or stainless steel pipe? What will I need to install into the chimney? I believe its called a thimble? How do I go from the 3" or 4" pipe into the 8" opening into the chimney? I don't have any of the old brick wall attached anymore will I need to tile the wall to prevent it from getting too hot?

The stove I'm thinking about buying is http://www.ghpgroupinc.com/product-detail.aspx/cabinet-pellet-stove since I got quite a bit of amazon gift cards so it'll end up being pretty cheap for me.

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What you really need is the install instructions to the stove. You can most likely download them from the stove manufacturer in PDF for free, most offer them.. Because you need to know about EVL limits, size of pipe, do they require you to drop a liner in the clay chimney etc. In there are all the answers and specs for clearances. I had manuals in PDF to all three stoves I was considering purchasing before I even made the purchase.

Based on your questions above you have a lot of beginner info to collect before you attempt a safe install. Take your time, make it safe !

Search and Read through the forum about installs. Personally I would run the 4" all the way up through your existing 8". A lot easier to clean.

stmar said:

Search and Read through the forum about installs. Personally I would run the 4" all the way up through your existing 8". A lot easier to clean.

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I would as well and did. The manufacturer may or may not actually require that . Non the less it's generally a safe bet as long as EVL is met. Course I didn't have a lot of choice, my flue way was larger than 8" to begin with. Additionally some stove manufacturers require it into a pre existing clay lined chimney install.

pchan6788 said:

I've talked to a couple pellet stove stores and learned that the installers will just install my new pellet stove into the existing clay flue that my old wood stove was using. They said that since my house isn't that new that they don't have to install an outside air kit. It seems like its just a plug and play type of situation.

My city office and insurance are fine with me installing it by myself. I'm fairly handy and think I could attach all the vent pipe from the stove to the 8 inch opening in my wall into the chimney. What kind of pipe will I need to buy? The black or stainless steel pipe? What will I need to install into the chimney? I believe its called a thimble? How do I go from the 3" or 4" pipe into the 8" opening into the chimney? I don't have any of the old brick wall attached anymore will I need to tile the wall to prevent it from getting too hot?

The stove I'm thinking about buying is http://www.ghpgroupinc.com/product-detail.aspx/cabinet-pellet-stove since I got quite a bit of amazon gift cards so it'll end up being pretty cheap for me.

Click to expand...

What are you using for heat right now? With oil where it is right now, I would strongly advise against running down to the store and buying a pellet stove to plug in and play this afternoon with 20 below temps coming tonight ............... do some research, line up a pellet source, think this over ..............

pchan6788 said:

Right now I'm using my boiler for heat and hot water. I wanted to add the pellet stove to help heat up the basement level to make the house warmer. I looked at Lowes and Home Depot but couldn't find a 3" or 4" adapter to 8" to attach into my existing flue. The Flue is 8" x 8" clay tiles.

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Here is the manual for the stove in PDF if you don't already have it. : http://www.ghpgroupinc.com/manuals/fireplace/IM_P(EN_FR)PH_Pellet Stoves_2013-02-06_MD.PDF

Just an FYI

We have all of our pellet stoves direct vented through the wall.

Easy, inexpensive, quick to clean with no need to scale the roof

A 2 to 4 foot straight out the wall or with a single 45 ???

I am a staunch advocate of direct venting.

I have had a roof type high chimney, ahhhh, never again.

From the manual there are two installs into a clay lined chimney, it sounds like yours is the first. Note, they show an air tight clean out at the base of the chimney and also a clean out in the venting in the house. Air tight being critical, be sure of that if you vent like I think you are going to.

On another note, I love my vertical vent but it is not configured like either setup. Mine has a 4" liner from inside the fireplace that goes up 26'. And I just clean from the bottom up. A total non issue cleaning the vent, except to have a vac on for dust control. I just let the ash come down into an empty pellet bag, done deal.

I have to wonder why they drew that plan up the way they did. In my mind your question is a legit question. But ya know, I think I would contact the manufacturer before going ahead with that idea or otherwise just do it as drawn up. If you are having this inspected they probably will want to see those instructions and you would have no questions from the inspector when done by the plan ( in most areas/towns/cities etc. anyway)..

So my statement :
Do it by the plan or contact the manufacturer. There is contact info at the web site you linked us to.

Don't know if it'll work, but let me know if ya want it .................
https://www.hearth.com/talk/threads/duravent-pro-4-x-8-adapter.138399/

Looks like it should work for that configuration ............

pchan6788 said:

If I do configuration D in the manual does the turn in the chimney count as a 90? So it's either 2 or 3 90's, I'm trying to size what diameter piping I would need.

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It's a 90 but it's basically a non EVL issue because it's 8". I'll tell you what, after experiencing the leeway in ash build up using 4" I don't know if I ever would use 3" vent except in a short direct vent situation. But that's me. I would adapt to 4" right off the back of the stove personally..

I'm considering a self-install of a Mt. Vernon E2 stove to an existing chimney. I plan on installing a new 4' liner into the existing chimney. The 8" thimble goes into the 8X12 clay flue chimney on the first floor up 25' to the roof. The same chimney goes all the way down to the basement where my old woodstove used to be connected. My question is, going into the chimney from the first floor, do I install a Tee from the thimble and up the chimney or curve the new liner through the thimble and up and out to the roof. The other side of the tee in the chimney will point down towards the rest of the flue to the basement.

pchan6788 said:

I've talked to a couple pellet stove stores and learned that the installers will just install my new pellet stove into the existing clay flue that my old wood stove was using. They said that since my house isn't that new that they don't have to install an outside air kit. It seems like its just a plug and play type of situation.

My city office and insurance are fine with me installing it by myself. I'm fairly handy and think I could attach all the vent pipe from the stove to the 8 inch opening in my wall into the chimney. What kind of pipe will I need to buy? The black or stainless steel pipe? What will I need to install into the chimney? I believe its called a thimble? How do I go from the 3" or 4" pipe into the 8" opening into the chimney? I don't have any of the old brick wall attached anymore will I need to tile the wall to prevent it from getting too hot?

The stove I'm thinking about buying is http://www.ghpgroupinc.com/product-detail.aspx/cabinet-pellet-stove since I got quite a bit of amazon gift cards so it'll end up being pretty cheap for me.

Click to expand...

As Stmar wrote, I ran a 4" stainless up my flue and capped it. I have three separate flues in the same huge chimney. One for the Dino and one for each of two fireplaces. Do NOT try to dual purpose any and the SS will preclude future problems with the original liner.

Edsson said:

I'm considering a self-install of a Mt. Vernon E2 stove to an existing chimney. I plan on installing a new 4' liner into the existing chimney. The 8" thimble goes into the 8X12 clay flue chimney on the first floor up 25' to the roof. The same chimney goes all the way down to the basement where my old woodstove used to be connected. My question is, going into the chimney from the first floor, do I install a Tee from the thimble and up the chimney or curve the new liner through the thimble and up and out to the roof. The other side of the tee in the chimney will point down towards the rest of the flue to the basement.

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I think you'd have better luck with a NEW thread for your issue